SERVICE GROUNDING AND BONDING

[lvdugger]

INSTALLATION. THE LOCAL UTILITY REQUIRES YOU TO HAVE A CUSTOMER OWNED 13800 VOLT SERVICE POLE WITH ISOLATION SWITCH AND FUSEABLE CUTOUTS. YOU ARE FEEDING A 3000 KVA 13800 VOLT DELTA TO A 480/277 VOLT WYE OUTDOOR TRANSFORMER . FEEDING FROM TRANSFORMER TO A 3000 AMP 480/277 VOLT MAIN SWITCHGEAR IN A BUILDING. WHERE IS THE MAIN SERVICE DISCONNECT? THE SERVICE POLE OR THE MAIN IN THE BUILDING? CAN YOU PULL 3 PHASES AND A NETURAL AND BOND THE NEUTRAL IN THE TRANSFORMER AND BOND THE NETURAL AT THE 3000 AMP MAIN SWITCHGEAR ? OR DO YOU HAVE TO PULL NETURALS AND GROUNDS FROM THE TRANSFORMER TO THE SWITCHGEAR AND TREAT SWITCHGEAR AS A SUB PANEL. THANKS

 

[Dennis Alwon]

Your service ends at the first disconnect in the service. The wires feeding to the building would be just feeders and not service equipment. That's my answer unless I am misunderstanding something.

 

[publicgood]

As Dennis said. The building is being fed by an outside feeder, subject to similar requirements as 230.

 

[kwired]

INSTALLATION. THE LOCAL UTILITY REQUIRES YOU TO HAVE A CUSTOMER OWNED 13800 VOLT SERVICE POLE WITH ISOLATION SWITCH AND FUSEABLE CUTOUTS. YOU ARE FEEDING A 3000 KVA 13800 VOLT DELTA TO A 480/277 VOLT WYE OUTDOOR TRANSFORMER . FEEDING FROM TRANSFORMER TO A 3000 AMP 480/277 VOLT MAIN SWITCHGEAR IN A BUILDING. WHERE IS THE MAIN SERVICE DISCONNECT? THE SERVICE POLE OR THE MAIN IN THE BUILDING? CAN YOU PULL 3 PHASES AND A NETURAL AND BOND THE NEUTRAL IN THE TRANSFORMER AND BOND THE NETURAL AT THE 3000 AMP MAIN SWITCHGEAR ? OR DO YOU HAVE TO PULL NETURALS AND GROUNDS FROM THE TRANSFORMER TO THE SWITCHGEAR AND TREAT SWITCHGEAR AS A SUB PANEL. THANKS

Customer may pay for the mentioned 13800 volt equipment, but are they responsible for installing and maintining it?

Ask where the "service point" is, that is where NEC requirements kick in.

 

[Smart $]

INSTALLATION. THE LOCAL UTILITY REQUIRES YOU TO HAVE A CUSTOMER OWNED 13800 VOLT SERVICE POLE WITH ISOLATION SWITCH AND FUSEABLE CUTOUTS. YOU ARE FEEDING A 3000 KVA 13800 VOLT DELTA TO A 480/277 VOLT WYE OUTDOOR TRANSFORMER . FEEDING FROM TRANSFORMER TO A 3000 AMP 480/277 VOLT MAIN SWITCHGEAR IN A BUILDING. WHERE IS THE MAIN SERVICE DISCONNECT? THE SERVICE POLE OR THE MAIN IN THE BUILDING? CAN YOU PULL 3 PHASES AND A NETURAL AND BOND THE NEUTRAL IN THE TRANSFORMER AND BOND THE NETURAL AT THE 3000 AMP MAIN SWITCHGEAR ? OR DO YOU HAVE TO PULL NETURALS AND GROUNDS FROM THE TRANSFORMER TO THE SWITCHGEAR AND TREAT SWITCHGEAR AS A SUB PANEL. THANKS

Quite possibly the service pole. As noted previously, verify the Service Point with POCO.

You can pull a neutral and bond at both the transformer and the building main if there are no conductive pathways which would create a parallel pathway for neutral current, such as metal raceway. See 250.30(A)(1) Exception No. 2 and 250.30(A)(2) Exception.